Improved boot-crimping- machine



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BERNHARD ESCH, OF SANDUSKY, OHIO.

Letters Patent No. 90,648, dated .Tune 1, 17869.

IMPROVED Boor-'cfRIMPING MACHINE.

To all whom fit may concern:

Be it known that I, BERNHARD Escn, of Sandusky, in the county of Erie, and State of Ohio, have invented a new and improved Crimping-Machine; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specication, in which Figure l is a section taken centrally through the crimping-machine in the plane indicated by line Y Y l in rig. 2.

Figure 2 is a section through the machine, taken in the plane indicated by line X X, in g. 1..

Figure- 3, sheet 2,-is a sectional view, similar to that of fig. 2, showing a slight modification in the construction ofthe crimping-board and stretching-bars.

Similar letters of reference indicate corresponding parts in the several iigures.

The object of this invention is to improve portable crimping-machines, which are used for crimping the leather uppers of boots, by effecting the combination of jointed stretching-bars and an adjustable screw with a crimping-board, in such manner that by a simple adjustment of a single screw the stretching and crimping can be properly performed.

To enable others skilled in the art to understand my invention, I will describe its construction and operation.

I will rst describe the machine, which is illustrated' on sheet l 0f the drawings, andafterward explain the .f modification delineated on sheet- 2.

A represents the crimping-board, which consists ofY leg and foot-portions, shaped and otherwise constructed like well-known crimping-boards hitherto used.

The back edge of the leg-portion and the bottom edge of the foot-portion of this board A, are bevelled at c c, in the manner indicated in the cross-section,iig. 2,

and upon these hevelled edges the metallic stretchingbars B B are fitted, which bars are of a V-shapein cross-section, as indicated in iig. 2.

The bar B is applied to the hack edge c, of the legpoltion of the crimping-board A, and extends the entire length thereof.

This baris connected to short, obtuse-angular heelportion B2, of the bar B, by a pivot, a, which forms a hinged joint for allowing one-bar to move independently of the other.

Through the portion B2 of har B, a hole is made, which is tapped to receive the threads of the screw D, as shown in g. 1.

This screw, D, is perpendicular to the portion B,

and forms an angle of forty-five degrees with the backand bottom edges c c of the crimp-board A.

The outer end of the screw D has a ring or other suitable handle formed onit, and near the end of this screw it is contracted so as to form a cylindrical neck, d, which is embraced by a plate, g, that is screwed fast tot-he recessed heel-portion of the crimp-board A.

The extreme rounded end oi' the said screw abnts against a metal block, e, which prevents undue friction while turning the screw.

The plate g allows the screw D to be turned freely, but does not allow` it to receive endwise play.

O C are two metallic guides, whose guiding-edges are parallel to the screw D. One of these guides is secured rigidly into a recess formed in the bottom edge of the foot-portion of the crimping-board, and the other guide, O, is similarly secured to the back edge c of this crimping-.hoardl Each guide passes loosely through its respective stretching-bar in the plane of the crimp ing-board. l

In order to hold the edges of the leather upper j, during the crimping-operation, I employ the V-shaped serrated clamps G G', one of which, G', is perforated, and receives the screw D loosely through it, and the others, G G, are applied at different points to the bars B B, for griping and holding the leather.

These clamps, G G, gripe the leather so as to hold its edges iirmly against the bevelled surfaces ot' the bars B 'B' The operation is as follows:

The leather, j', is applied around the crimping-board A, and its edges clamped to the bars B B; as above described. The screw D is then turned, which moves 'both the bars B B, away from the crimping-board, so

as to draw and crimp the leather upon the front edge of this board, from the toe to the highest point of the leg.

During the operation of turning the screw D, and separating the stretching-bars from the crimp-board, the leather is rubbeddown evenly upon the said board with the pane ot' a hammer or other suitable instrument.

Instead of constructing the bars B B of metal, as shown in figs. 1 and 2, they may be made of solid pieces of wood, in which case the`back edge of the leg, and bottom edge of the foot-portions of the crimping-board may be ila-t instead of bevelled as above described, and the wooden bars will be shaped as represented in crosssection, iig. 3.

'In all other 'respects the machine, partly represented iny g. 2, may be constructed like the machine represented on sheet 1.

It will he seen, from the abovedescription, that by means of a single screw, D, the two bars B Bl can be adjusted simultaneously.

Having described my invention,

What I claim as new, and desire to secure byLetters Patent, is-

1. The application, to a crimping-hoard, A, of jointed bars B B, and an adjusting-screw, D, arranged so as to adjust both of these bars simultaneously, substantially as described.

2. Arranging the screw D and guides O O, in parallel lines, and applying these parts to the crimpingboard and stretching-bars, substantially as described.

BERNHARD ESOH..

Witnesses J oHN McKnLvEY, E. MsGoLvER. 

